Self-Managed
International Slow Pitch Softball World Championships
New to athlete partnerships? See how sports sponsorship works on OpenSponsorship.
Brands can sponsor World Championships 2021 on OpenSponsorship by creating a free account, browsing World Championships 2021's profile, and sending a sponsorship proposal for social posts, appearances, or integrated campaigns. OpenSponsorship handles messaging, deliverables, and deal terms in one platform so you can connect directly with this event.
World Championships 2021 is listed on OpenSponsorship and available for brand sponsorships. Brands can review campaign packages, audience details, and pricing on this profile, then submit a proposal to start a partnership with this event.
According to OpenSponsorship, World Championships 2021's audience includes 15K+ Instagram followers, based in Florida, United States. Brands can use this profile to evaluate reach, content niche, and sponsorship fit before sending a proposal.
How do you measure influencer marketing ROI when half the numbers social media gives you are vanity metrics? It is the question brands ask us most, and it came up again when I joined Massimo Marinelli on the Berkida Ventures Podcast. After more than ten years and thousands of brand deals with athletes and creators at OpenSponsorship, here is how we think about it, and the framework we use with our clients.
October 28, 2026
